1,5-Benzodiazepine derivatives were synthesized by the condensation reactions of o-phenylenediamine and ketones catalyzed by bismuth (III) salts under mild conditions. This method is easy, efficient, environment and eco-friendly, free of toxic catalysts, and gives good to excellent yields of 1, 5-benzodiazepines.
Retraction Note to: An environmentally benign one pot synthesis of substituted quinolines catalysed by fluoroboric acid based ionic liquid